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Finding the Fourth Proportional to 43.81, 65.64 and 19.73

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Solution

The fourth proportional to 43.81, 65.64 and 19.73 is: 29.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.81 : 65.64 = 19.73 : x
  2. Step 2: Convert to fraction form
    43.81/65.64 = 19.73/x
  3. Step 3: Cross multiply
    43.81x = 65.64 × 19.73
  4. Step 4: Simplify right side
    43.81x = 1,295.08
  5. Step 5: Solve for x
    x = 1,295.08/43.81
  6. Step 6: Final answer
    x = 29.56

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